Premium
Developmental pathways for shaping spike inflorescence architecture in barley and wheat
Author(s) -
Koppolu Ravi,
Schnurbusch Thorsten
Publication year - 2019
Publication title -
journal of integrative plant biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.734
H-Index - 83
eISSN - 1744-7909
pISSN - 1672-9072
DOI - 10.1111/jipb.12771
Subject(s) - triticeae , inflorescence , biology , panicle , hordeum , botany , hordeum vulgare , spike (software development) , leymus , poaceae , agronomy , genetics , genome , grassland , gene , management , economics
Grass species display a wide array of inflorescences ranging from highly branched compound/panicle inflorescences to unbranched spike inflorescences. The unbranched spike is a characteristic feature of the species of tribe Triticeae , including economically important crops, such as wheat and barley. In this review, we describe two important developmental genetic mechanisms regulating spike inflorescence architecture in barley and wheat. These include genetic regulation of (i) row‐type pathway specific to Hordeum species and (ii) unbranched spike development in barley and wheat. For a comparative understanding, we describe the branched inflorescence phenotypes of rice and maize along with unbranched Triticeae inflorescences. In the end, we propose a simplified model describing a probable mechanism leading to unbranched spike formation in Triticeae species.